6. “Hello-o-o, nurse!” was originally intended to be Buster Bunny’s signature catchphrase. It was dropped because it made no sense for the character.

7. Producers originally wanted Patrick Stewart to voice Brain.

8. The character of Minerva Mink starred in the least number of solo shorts (only two). Reportedly, her character was scaled back because she was too sexually suggestive for the show’s intended audience.